Merge 1781 back to main line. Closes #1781 (since #1781 involves creating a...

Merge 1781 back to main line. Closes #1781 (since #1781 involves creating a test.) There is a bug exposed by the x2.tdb test, but actually making the x2 test run right is a separate issue (Refs #1823).
{{{
svn merge -r 12282:12548 https://svn.tokutek.com/tokudb/toku/tokudb.1781
}}}


git-svn-id: file:///svn/toku/tokudb@12860 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/cachetable.c

@@ -1700,7 +1700,9 @@ toku_cachetable_end_checkpoint(CACHETABLE ct, TOKULOGGER logger, char **error_st
     }
 
     if (logger) {
-	int r = toku_log_end_checkpoint(logger, NULL, 0, ct->lsn_of_checkpoint_in_progress.lsn);
+	int r = toku_log_end_checkpoint(logger, NULL,
+					1, // want the end_checkpoint to be fsync'd
+					ct->lsn_of_checkpoint_in_progress.lsn);
 	assert(r==0);
 	toku_logger_note_checkpoint(logger, ct->lsn_of_checkpoint_in_progress);
     }